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DERIVATIVES - Summary of Derivative Financial Instruments and Balances (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
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Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | $ 20,305,538 | $ 19,828,103
Derivative Asset | 301,938 | 357,698
Derivative liabilities | 301,938 | 357,698
Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral | (39,838) | (58,295)
Gross amounts of recognized liabilities | 301,938 | 357,698
Derivative Liability, Fair Value, Gross Asset | (341,776) | (415,993)
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 2,248,403 | 2,206,351
Derivative Asset | 10,458 | 5,057
Derivative liabilities | 114,269 | 147,759
Fair Value Hedges | Matched interest rate swaps | Accrued interest and other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 2,248,403 | 2,206,351
Derivative Asset | 114,269 | 147,759
Derivative liabilities | 10,458 | 5,057
Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral | (127,424) | (161,232)
Gross amounts of recognized liabilities | 124,727 | 152,816
Derivative Liability, Fair Value, Gross Asset | (252,151) | (314,048)
Foreign Exchange | Matched interest rate swaps | Accrued interest and other assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 7,927,466 | 7,734,395
Derivative Asset | 99,348 | 111,078
Derivative liabilities | 77,863 | 93,804
Foreign Exchange | Matched interest rate swaps | Accrued interest and other liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative, Notional Amount | 7,881,266 | 7,681,006
Derivative Asset | 77,863 | 93,804
Derivative liabilities | $ 99,348 | $ 111,078

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